Custom string transform function

Introduction

The custom string transform function is used to map a given string to a target field. This string can be static, or you can reference flow variables and cached data.

If you've added/updated a map shape before, you'll be used to selecting a source field and a target field. However, when a custom string transformation is used we don't select a source field - the custom string transformation is our data source.

Adding a custom string transform

Step 1 In your process flow, access settings for your map shape:

Step 2 Select the add transform button for the required mapping rule - for example:

Step 3 Click the add transform button:

Step 4 Click in the name field to access a list of all available transform functions, then select custom string:

Step 5 Move down to the custom string field and enter your required text or variables - for example:

For more information about referencing flow variables in a custom string, please see our Referencing flow variables in field mapping transformations page. For more information about referencing cached data in a custom string, please see our Referencing a cache in mapping transformations page.

Step 6 Accept your changes:

...then save the transformation:

Step 7 Now you can select a target field in the usual way - for example:

...then:

...then:

Step 8 Once your mapping is complete, the row should be displayed without a source field - for example:

From here you can save changes or add more mapping rules as needed. Next time the process flow runs, the custom string (or associated values from variables) will be mapped to the given target field.